Pile-fabric loom



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W. W. ROBERTSON ET AL PILE FABRIC LOOM Fild Jan. 5, 1923 Efatented 19, 1926..

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VLLA'Jl/f W. ROEEETSN AND EVERETT E. CLARK, OE WORCESTER, MASSACI-ISETT,

OF VIORCESTER, JIASEACH'- SETTS, A CGRPORATION OF IVIASSACHUSETTS.

PILE-FABRIC LOOE.

Application filcd January 5, 1923.

This invention relates to a pile fabric loom and particularly to an irnproved device for supporting an operatively positioned yarn tube frame therein.

There is at the present'time a heavy demand for pile fabric looms of greater width than have been heretofore commonly used, the particular object being to produce a wide rng or carpet `without piecing together several separate widths of carpet to produce the desired width. These wide looms re.- quire long and relatively heavy tube frames which should be supported at one or more intermediate points to properly position the tuft yarns and to cause the same amount of yarn to be delivered from each yarn tube.

It is the object of our invention to provide an improved device for thus additionally supporting the tube frames and particularly to provide an improved and simplified actuating mechani sm therefor.

Our invention further relates to arrangements and combinations of parts which Will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of our invention is shown in the drawings in which Fig.` 1 is a sectional side elevation of parts of a loom embodying our improvements; i

Figs. 2 and 3 are similar views showing certain parts in different successive position-; and

1- is a plan view of certain actuating conneetions.

tei'erring to the drawings, we have shown a portion of the loom frame 10 of a pile fabric loom having the usual cam shaft 11 :'otatably mounted in bearings thereon. VVe have also indicated a lay 12 'supporting a reed 13, a rear knife 14, and a tube frame 16 having a plurality of yarn tubes 17 secured thereto and support-mg the yarn spools 18. The parts thus far described are of the usual type and in themselves form no part of our present invention which relates particularly to the means for additionally supporting the frame 16 at an intermediate point.

For this purpose we provide a frame enaging device comprising a support 19 formmg the end of a lever 20 which 1n turn 1s supported at one end by a bell crank 21 and at an intermediate point by a link 22. The hell Crank 21 is pivoted on a stud 23 fixed senai No. 810,748.

in a bracket 211 (Fig. 4) secured to a cross beam 10'GL of the loom frame 10.

The upper end of the link 22 is adjustably connected to a lifting arm 25 which swings about the stud 23. An actuating member 26 is also pivoted on the stud 23 and has a yielding connection with the bell Crank 21, this connection comprising a rod 27 mounted in one arm of the bell crank 21 and extending` loosely Vthrough a recessed projection 28 on the member 26. A spring 29 and lock nuts 30 are placed on the lower end of the rod 27, the spring receiving the downward thrust of the member 26 which thus yieldingly actuates the bell crank 21.

The member 26 has an extension 26a beyond its pivot which is slotted to receive an adjustable roll 30EL positioned to engage the under side of the lifting arm 25. The actuating member 26 isadjustably connected by a link 31 to a lever 32 mounted on a fixed pivot 33 and having a roll 34k engaged by a cam 35 mounted on the cam shaft 11. The cam 35 is preferably forined with two Steps on its advancing face, for a purpose to described. A spring 86 retains the roll 3d in contact with the cam and yieldingly witbdraws the tube engaging support 19 from operative position.

Having thus described the details of construction of our invention, the use and operation thereof is as follows:

Assumingthat the parts arerin the position shown in Fig. 1, with'the tube frame 16 disposed in operative position, the first or inner step of the cam 35 will actuate the member 26 through the lever 32 and link 31, drawing the member 36 downward and thus applying yielding pressure through the spring 28 to the .bell Crank 31. Such movement of the bell orank advances the support 19 toward the tube frame, and the member is also given a slight downward movement by reason of the relation of the pivots of the link 22,

The parts are thus moved to the position shown in Fig 2 in which the support 19 projects under and engages the tube frame 16. The roll 80 on the extension 26a has been moving upward at the same time but on account of lost motion between the parts it does not eng'age the lifting arm 25 until the support 19 has reached the position shown in Fig. 2.

The second and outer step of the cam 35 then engages the roll 34: on the lever 32, moving` it further in the same direction and causing;` the roll 30 on the actuating member 26 to lift the arm 25 as indicated in Fig. 3, raising the support 19 and tube frame 16 at an intermediate point as the ends of the tube frame are raised to draw the tuft yarns from the spools.

`We thus secure two different operative movements for the support 19 by using a single cam 35 and a single cam lever After the lever 32 is released by the cam 35, the spring` 36 returns the parts to their normal inoperative position. VVe have found that the support 19 may be desirably formed of Wire rod or other slightly fiexible material as an entirely rigid structure is not required.

Our improved construction is thus exceedingly simple and reliable, as well as ineX- pensive to manufacture and easily mounted and adj usted on the loom. It will be understood that more than one support 19 may be provided where the width of the loom makes it desirable.

Having thus described our invention and the advantages thereof, we do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what we claim is l. In a pile fabric loom having a plurality of tube frames movable successively to operative position, in combination, a support effective to engage an operatively positioned tube frame at a point intermediate the ends of the frame, and means to move said support, said means comprising a continuously moving cam, a single cam lever actuated thereby, and yielding and positve connections from said cam lever to said support through which the frame-engaging end of said support is given successive substantially liorizontal and Vertical operative movements, said cam lever being effective Leoeaii through said yielding and positve connections to yieidingly' actuate said support during its first and horizontal movement and to Vpositively actuate said support during its second and Vertical movement.

2. In a pile fabric loom having` a plurality of tube frames movable successively to operative position, in combination, a support effective to engage an operatively positioned tube frame at a point intermediate the ends of the frame, and means to move said support, said means including a twostep cam, a cam lever engaged thereby, and connections from said cam lever to said support through which engagement of said cam leVer by the first and inner step of said cam produces a substantially horizontal positioning movement of the frame-engagin` end of said support and engagement of said cam lever by the second and outer step of said cam produces a substantially Vertical operative movement ofthe frame engaging cnd of said support.

3. In a pile fabric loom having a plurality of tube frames movable successively to operative position, in combination, a device effective to engage an operatively positioned tube frame at a point intermediate the ends of the frame, and means to move said device, said means comprising a lifting arm,

a link connecting' said arm to an intermediate point in said device, a bell crank connected to one end of said device and a camactuated member movable in a single direction to first yieldingly engage said bell cranl: and to thereafter positively engagc said arm through a lost motion connection, thereby giving the frame enga'ing end of said device succcssive substantially horizontal and Vertical movements.

n testimony whereof we have hereunto atiiXed our signatures.

WTLLAM VV. ROBERTSON. EVERETT E. CLARK. 

